So figuring from Modern soap makers eo calc- I get the MAX usages for 40 oz of Oils- would be 40oz divided by 16(one pound) gets 2.50 lbs of oils-- 2.50 times .70(max usage if Bergamot) would leave you with 1.75 OZ MAX... then Cedarwood is max uage of .50 per pound of oils ( so 2.50 times .50=...